.\" Copyright (c) 2011 Kai Wang
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.\" $Id$
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.Dd August 21, 2011
.Os
.Dt DWARF_DIE_LINK 3
.Sh NAME
.Nm dwarf_die_link
.Nd link a debugging information entry
.Sh LIBRARY
.Lb libdwarf
.Sh SYNOPSIS
.In libdwarf.h
.Ft Dwarf_P_Die
.Fo dwarf_die_link
.Fa "Dwarf_P_Die die"
.Fa "Dwarf_P_Die parent"
.Fa "Dwarf_P_Die child"
.Fa "Dwarf_P_Die left"
.Fa "Dwarf_P_Die right"
.Fa "Dwarf_Error *err"
.Fc
.Sh DESCRIPTION
Function
.Fn dwarf_die_link
links the provided debugging information entry to another debugging
information entry.
The debugging information entry will be unlinked first if necessary.
.Pp
Argument
.Ar die
should specify the debugging information entry whose link the function
is going to modify.
.Pp
Argument
.Ar parent
specify the new parent link of the debugging information entry.
.Pp
Argument
.Ar child
specify the new first child link of the debugging information entry.
.Pp
Argument
.Ar left
specify the new left sibling link of the debugging information entry.
.Pp
Argument
.Ar right
specify the new right sibling link of the debugging information entry.
.Pp
Only one of arguments
.Ar parent ,
.Ar child ,
.Ar left
and
.Ar right
is allowd to be non-NULL.
.Pp
If argument
.Ar err
is not NULL, it will be used to store error information in case
of an error.
.Sh RETURN VALUES
On success, function
.Fn dwarf_die_link
returns the debugging information entry provided in argument
.Ar die .
In case of an error, function
.Fn dwarf_die_link
returns
.Dv DW_DLV_BADADDR
and set the argument
.Ar err .
.Sh ERRORS
.Fn dwarf_die_link
can fail with:
.Bl -tag -width ".Bq Er DW_DLE_ARGUMENT"
.It Bq Er DW_DLE_ARGUMENT
Argument
.Ar die
was NULL.
.It Bq Er DW_DLE_ARGUMENT
More than one of the arguments
.Ar parent ,
.Ar child ,
.Ar left
and
.Ar right
were non-NULL.
.El
.Sh SEE ALSO
.Xr dwarf 3 ,
.Xr dwarf_add_die_to_debug 3 ,
.Xr dwarf_new_die 3
